Magnetic controlling mechanism



H. A. STEEN.

MAGNETIC CONTROLLING MECHANISM.

APPLICATION FILED Aue.2|. ma.

Patented July 26, 1921.

UNITED STATES PATENT OFFICE.

HALFDAN A. STEE N, OF CHRISTIANIA, NORWAY, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO ALLIS-CHALMERS MANUFACTURING COMPANY, A CORPORATION 01' DELAWARE MAGNETIC CONTROLLING MECHANISM.

Specification of Letters Patent.

Patented July 26 1921.

Original application filed June 19, 1911, Serial No. 634,149. Divided and this application filed August 21,

1918. Serial No. 251,344.

T 0 all whom it may concern Be it known that I, HALFDAN A. STEIJN, a subject of the Kin of Norway, residing at -Christiania,in the ingdom of Norway,have invented a certain new and useful Improvement in Magnetic Controlling Mechanisms, of which the following is a. specification.

This invention relates to magnetic controlling mechanism and may be used, if desired, with any form of switching mechanism such as, for example, isshown in applicants original application Serial N 0.. 634,149., filed June 19, 1911, now ,Patent No. 1,279,779, issued Sept. 24, 1918, and ofwhich this application is a division. It may, however, be

stated that it will be obvious as thedescription proceeds that the particular form of switchmechanism used with the present invention is not material.

One of the objects of the invention is the production of a magnetic controlling mechanism of very compact form 'so that the same will take lessjspace on switchboards or whereever the same may be mounted. It is highly desirable, for example, that circuit breaking and controlling devices 'shalltake as little space, both vertically and horizontally on a switchboard, as possible. v i

Another object of the invention is the production of such magnetic controlling mechanisms in themost expeditious and cheapest way. Other objects will appear hereinafter as the description of the invention proceeds. The novel features of the invention will appear from the specification and the accompanying drawing which forms a part thereof, and will be particularly pointed out in the claims. y I

The single "figure of the accompanying drawing shows a side elevation, partly in section, of the magnetic controllingmechw' nism as it may be ap lied in a circuit breaker, the parts beings own in closed-circuit position. a

Terminal studs,-1, 2, are mounted upon and pass through a switchboard 21, which latter may be of any usual suitable insulating material. The stud 1 may have any suitable contact,'such as 23, mounted upon the end 3 thereof. A movable switch arm 41 is pivoted by means of pin 5 in a housing 6 which latter housing is mounted in any suitable manner on the board 21. The switch describe in this application the particular form of operating mechanism for the movable switch member 4 as both this and the I contact mechanism involving the contacts 22, 23, and the auxiliary contacts shown above them, have been fully described in the original application referred to above. It is sufficient to state here that 24 is the handle of that operating mechanism and 7 is a latch which serves the purpose of holding the op erating mechanism, and consequently the switch member, in, switch-closing position.

A coil 8, which may be wound of conducting material of any cross sectional form, but is conveniently wound of some form of flat strip material, is disposed between the upper and lower studs 1, 2 as shown. The coil 8 has two terminals 9, 10, one of which is electrically connected and preferably mounted on an extension of the contact stud 2. The terminal 9 of this coil is insulated in any suitable manner from the terminal 10 thereof, as indicated, and this terminal is further adapted to be connected in anysuitable manner to the contact 22 carried by the switch arm. 4, as by the flexible conducting member 11. It may be stated that the manner in which current passes from the terminal 9 of the coil 8 to the contactend of stud 1 is entirely immaterial. a

An armature 12 is mounted in any suitable manner so that the flux produced by the coil 8 will attract the same and when so efiectively attracted will cause the projection 13' on the armature 12 to strike the upwardl extending arm 14: on the latch 7 so that thls latch will. be disengaged and "thus release the switch member 4 thereby permitting the circuit interrupter to open by gravity or spring means, or otherwise.

Another magnet 15, which may be of any desired form and is here shown as a novoltage or shunt magnet, is mounted below the terminal. stud 2 and is, here shown as normally attracting an armature 16 against the tension of a spring 20. When the magnet 15 is deenergized the spring 20 will act to cause the roller 17, carried by the armature 16, to strike against the roller 18 carried by the extension 19 on the latch 7 thus, as in the case of the armature l2, likewise lifting the latch Tand permitting the movable contact member to assume its open position.

The operation oi the magnetic controlling mechanism is thought to be apparent from the description of its parts, so that it is suiii cient to state that when the contacts 22, 23 are in engagement current may pass from terminal stul l to its end 3, contact 23, contiict 22, fleXible conductor 11, through the coil 8 to terminal stud 2. If an overload takes place suflicient to lift the armature 12 or if the armature 16 is effectively moved, the latch 7 will be lifted and the switch arm 4 will swing in a clockwise direction thus separating contacts 22, 23 and thereby open ing the circuit;

It will be observed that by reason of the fact that theserie's' or overload coil 8 is moiinted between the terminal studs 1, 2, it is possibleto occupy the space which is ordinarily occupied by siibh a series co'il, by any other auiziliary coil or device 15. Furthermore, the coil 8 is sodisposed that it is possible to ivind the same. or flat material and connect to the terminal stud without bending the fiat material laterally or twisting it. ,This is by ieason er the fact that the cdil has its axis substantially at right angles to the axis of the terminal stud and is not disposed laterally thereto. In other words, the of the teriiiina-l is substantially parallel to and either iii or between the end planes of the cylinder describing the outei' fcontour of the coil. The compactness o lthis structure will be fiiither comprehended when it is noted that substantially all portions oi the 360 of are around the terminal stud 2 are occupied by useful elements beginning the coil 8, the latch leek-T, the armature 12, the switch arm 4:, the

,rmatiire 16, the coil 15 and the base 21. These elements are in ,eliect clustered radially about the terminal stud. It should be understood, that it is not desired that the invention claimed be limited to the exact details shoivn and described, for obvious modifications will occur to a person skilled the art. It is claimed and airs Patent: s a

1. In a magnetic controlling mechanism, stationary terminals, an overload coil disposed at one side of one of said terminals, meansincluding member for electrically bridgingsaid terminals and for connecting said overload coil in serie-swith said terminals and said bridging member, latch means operable by said overload coil for normally holding said member in bridging osition, and an auxiliary coil disposed at tie other side of the 'same terniinal, all of said "elemen'ts being in substantial alinement.

2.. In a magnetic controlling mechanism, a terminal, a coil having both the desired to secure by Let- 'coiiducting terminal ends thereof in juxtaposition and spaced apart and in alinement with the axis of said terminal, the mills of said coil being disposed in a plane substantially at right angles to the axis of said terminal and the coil beingplaced along its axis in such a position that a perpendicular to both the axis of the coil and the axis of the terminal will pass through some part of the coil.

3. In a magnetic controlling mechanism, a conducting terminal, a coil wound of flat conducting material and having both the terminal ends thereof in juxtaposition and spaced apart and in alinem'ent with the axis of said terminal, the axis of said coil being disposed in a plane substantially at right angles to the axis of said terminal, one of the terminal ends of: said coil being connected electrically to said terminal and the coil being placed along its axis in such a position that a perpendicular to both the axis of the coil and the axis of the terminal will pass through some part of the coil.

i. In a magnetic controlling mechanism, a conducting terminal, a coil having both the terminal ends thereof in juxtaposition and spaced apart and in alinement with the axis of said terminal, one of said terminal ends being connected to said conducting terminal, the coil being so disposed that the axis of the terminal passes approximately within the limits defined by the end planes of the coil.

5; In a circuit controlling device, stationary terminals, an overload coil disposed between said terminals, means extending from one of said terminals, over said coil to the other of said terminals for bridging said terminals and for connecting said overload coil in series with said terminals, and means whereby said connection is interrupted upon a predetermined current flow in said coil.

6. In a circuit controlling device having a plurality of stationary terminals and relatively stationary and movable contacts 0perati'vely related thereto, coils for causing effective operation of said movable contact "disposed in alin'ement with said terminals and alternating therewith, and means whereby each of: said coils may cause effective movement of said movable contact;-

.7. In a circuit controlling device, a stationary terminal, a contact carrying" elemei'it, two coils for controlling said contactcarrying element, said element and coils being clustered radially about said stationary terminal in the plane of movement of said element, and means whereby each of said coils may cause 'efi'ective movement of said contajct carrying element.

8. In a circuit controlling device having stationary terminals, a relatively stationary contact operatively related to one of said terminals and a relatively movable contact operatively related to the other of said terminals, a coil having its axis perpendicular.

to the plane of said terminals and connected in series between one of said terminals and one of said contacts, a second coil disposed on the side of one of said terminals opposite to that of said first coil, means for holding said movable contact in position and means 0 erated by each of said coils for releasing said holding means.

9. In a circuit controlling device, a stationary terminal, a movable contact-carrying element, means for holding said element in circuit-closing position, an overload coil and an armature therefor, an auxiliary coil and an armature therefor, said armatures being operatively related to said holdin means, the contact-carrying element, hol

circuit-closing ing means, overload and auxiliary coils and armatures, being disposed in a cluster about said stationary terminal in substantially the same plane.

10. In a circuit controlling device, stationary conducting elements, a movable conducting element adapted to bridge said stationary conducting elements, a coil disposed between said stationary conducting elements and the ends of said bridge, and means for connecting said coil in series with said stationary and movable conducting elements.

In testimony whereof I afiix my signa ture.

HALFDAN A. STEEN. 

